What is relative dating of fossils

10-Apr-2020 08:43

Extinction of species is common; most of the species that have lived on the earth no longer exist.

what is relative dating of fossils-53

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The Law of Superposition, which states that in an undisturbed horizontal sequence of rocks, the oldest rock layers will be on the bottom, with successively younger rocks on top of these, helps geologists correlate rock layers around the world.Once they are able to manipulate the cards into the correct sequence, they are asked to do a similar sequencing activity using fossil pictures printed on "rock layer" cards.Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.In reading earth history, these layers would be "read" from bottom to top or oldest to most recent.

If certain fossils are typically found only in a particular rock unit and are found in many places worldwide, they may be useful as index or guide fossils in determining the age of undated strata.

However, "relative" dating or time can be an easy concept for students to learn.

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